From KB0115492:
Assuming that the HomePageURL value in your smart client’s .sysconfig file is:
https://epicorservername.domain.net/EpicorProd/Apps/Erp/Home
The following URL will log the user account into an MES menu structure and will consume a DataCollection/MES user license.
https://epicorservername.domain.net/EpicorProd/Apps/Erp/Home/#/home/MES/home?mode=DC
The following URL will log the user account into an MES menu structure but will consume a full office license/default user license. If a customer has purchased dedicated DataCollection user licenses, this URL would not allow those DataCollection licenses from being used and may not function at all depending on the Kinetic release in question.
https://epicorservername.domain.net/EpicorProd/Apps/Erp/Home/#/login?app=MES